It's totally fine! I've made large purchases on there, and honestly AliPay has been better than paypal. Your payment isn't released to the seller until you confirm it's arrived and it's what you ordered. It's held by AliPay until then, so if a dispute does arise the money is there. I've also had a few disputes over average as items and the sellers have been willing to refund, or AliPay has sorted it for me. So, I would highly recommend it, but like eBay, you just need to make sure you read carefully what you are buying, and only buy from trusted sellers with good feedback. It also helps to message the seller before you order, or ask for extra pictures before you order to make sure they have the real product (as they often just use stock photos). Hope that helps!